diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelDAGToDAG.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp index 56bffaba31c..b5c0c35d12e 100644 --- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp +++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp @@ -32,6 +32,7 @@ #include "llvm/CodeGen/MachineRegisterInfo.h" #include "llvm/CodeGen/SelectionDAGISel.h" #include "llvm/Target/TargetMachine.h" +#include "llvm/Target/TargetOptions.h" #include "llvm/Support/Compiler.h" #include "llvm/Support/Debug.h" #include "llvm/Support/MathExtras.h" @@ -130,12 +131,17 @@ namespace { /// MachineBasicBlock *CurBB; + /// OptForSize - If true, selector should try to optimize for code size + /// instead of performance. + bool OptForSize; + public: X86DAGToDAGISel(X86TargetMachine &tm, bool fast) : SelectionDAGISel(X86Lowering, fast), ContainsFPCode(false), TM(tm), X86Lowering(*TM.getTargetLowering()), - Subtarget(&TM.getSubtarget<X86Subtarget>()) {} + Subtarget(&TM.getSubtarget<X86Subtarget>()), + OptForSize(OptimizeForSize) {} virtual bool runOnFunction(Function &Fn) { // Make sure we re-emit a set of the global base reg if necessary @@ -650,6 +656,10 @@ void X86DAGToDAGISel::PreprocessForFPConvert() { /// when it has created a SelectionDAG for us to codegen. void X86DAGToDAGISel::InstructionSelect() { CurBB = BB; // BB can change as result of isel. + if (!OptForSize) { + const Function *F = CurDAG->getMachineFunction().getFunction(); + OptForSize = !F->isDeclaration() && F->hasNote(Attribute::OptimizeForSize); + } DEBUG(BB->dump()); if (!Fast) |
